WIIKEY2 Backup Issue?

Well i installed my WIIKEY2 about two weeks ago on my brand new WII everything has been working fine until today. This morning i played a backup and everything worked fine then this afternoon i go to load up the game and it starts i was just about to start actually playing the game and WII errored out and said to restart which i did now no backups work except for Configure disk!
the original of the same game works no problems but backups don't work.
any help or ideas would be appreciated.